fix: (400 Bad Request) Invalid replyTo email address Mirko
fix: (400 Bad Request) Invalid replyTo email address Mirko

Hello,
I think that there is a problem with "replyTo".
I have this error (in subject) when use ```$Mailer->setReplyTo('mymailaddress@gmail', 'Mirko')```
Iandenh/cakephp-sendgrid